graves



(No Model.

2 Sheets-Sheet, 1.

J. GRAVES.

PORTABLE HEATER. No. 616,010 Patented Mar; 6, 1894.

I'id L a a a a A a i //Q r v P P i Z fl I Z m W 1, w''Jv WlTNESSES:

W wm

ATTORNEY m MTIDNI-L umowrmm column". WAIHINEYOIL c, a

(No Model.) 2 Sheets Sheet 2;

J. GRAVES.

PORTABLE HEATER. No. 516,010. Patented Mar. 6 1894.

WITNESSES: INVENTUR ATTORNEY n1: NAHQNAL LITHDORAFHIHG couPm.

UNITED STATES PATENT JOHN GRAVES, OF BROOKLYN, ASSIGNOR TO DEAN d:GRAVES, OF NEW YORK, N. Y.

PORTABLE H EATER.

EBECIFIGATION forming part of Letters Patent No. 516,010, dated March 6,1894.

Application filed June 22, 1892. Renewed January 9, 1894. Serial No.496,325. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN GRAVES, a citizen of the United States, and aresident of Brooklyn, in the county of Kings and Stateof New York, haveinvented certain new and useful Improvements in Portable Heaters, ofwhich the following is a specification.

My invention relates to portable hydro carbon heaters, and the purposeof the improvement is to produce a simple, cheap and effective steamheater.

The heater consists essentially of the combination with a suitableburner of astructure combining in one both radiator and boiler, theboiler being formed in or on the radiator base, and connecting with theradiator loops, and this base is formed externally with downwardly andoutwardly flaring wings, which confine the flame and products ofcombustion laterally but permit them to extend longitudinally under theradiator base.

My invention .also relates to the details of the construction of theradiator-boiler.

Referring to the drawings which accompany the specification to aid thedescription, Figure 1 is a side elevation, partly broken away, of thecombined radiator boiler and the burner. Fig. 2 is an elevation of aloop of the radiator-boiler omitting the burner. Fig. 3 is a verticalsection on the line X-X of Fig. 1, but showing the burner in elevation.Fig. at is a section of the burner on the line Y-Y of Fig. 3. Fig. 5 isa detail on smaller scale of two loops of the radiator-boiler showingthe throughway in the base and the method of joining sections. Fig. 6 isan elevation of a modification of the boiler-radiator with water pipesin the bottom,the wings being broken away. Figs. 7 and 8 are views ofthe bottom of the radiator-boiler, with one or more pipes respectively.Fig. 9 is a detail of the burner with a water-pan beneath.

My radiator-boiler, A, is preferably composed of a plurality of similarloops, a, a, each of which is formed integral with a section, b, of theboiler. The boiler, 19, is in fact, the modified radiator base, and iscast integral with the loops, a, and with heads, (1, d, facinglengthwise of the radiator base, which heads, cl, d, are centrallyperforated with threaded holes for the nipples, e, which unite theadjacent loops of the complete radiator-boiler. As many loops are takenas desired, and united by said nipples, e. Then screw plugs, f, f, arethreaded into the outer heads of the end loops, one of said plugs havingthreaded into it the filler, f, which is capped in the ordinary manner,and rises about to the top of the base, b. New said boiler sections, 12,Z), each have integrally cast on each side, external downwardly andoutwardly flaring rectangular wings, g, g, which, when the sections areput together form an inverted trough, as seen in Figs. 2 and 3, and eachof these said wings, g, has in its edge near its junction with the saidboiler sections a through and through semi-circular hole, 71 which formwhen the sections are put together, a row of round holes, along eachside of the radiator boiler, as seen in Fig. 1, for he escape of part ofthe heated air, which rises in the narrow interval between adjacentloops of the radiator. The end sections have legs, j, 3', cast on them,also handles, 70, 7a, to aid in carrying the apparatus about, and on oneof said end sections will be the air valve, Z, in the usual manner. Saidboiler sections, 12, b, are preferably each a little concave on theunder side, as shown in Fig. 3, and provided with corrugations, m,inside and out to increase the heatabsorbing surface, and formwater-pockets, in, in intimate contact with the burner flame. Under saidboiler sections, and either near the middle length of the completeradiator-boiler, or near one end is placed the burner, P, I prefer touse a burner of the form shown in the drawings, and which consists of ahollow base, 19, forming the mixing chamber preferably of oval plan, andhaving a plane upper edge, q, and communicating with a supply pipe, r,in which is an airinlet, '1", at right angles to the said pipe, '1', andpreferably bell mouth as shown. Said pipe,

7*, has a screw thread in the end, through which is threaded the gasnozzle, 3, of the gas supply pipe, t, and the said nozzle, 3, projectsjust across the aforesaid air inlet, T. On said burner base, 19, fits ahollow cap, 11., having a corrugated edge whereby are formed numerousopenings, u, communicating with the space within the base, p, and saidcap, it, is held in place on the base, p, by the bolt, '0. Said burneris adjustable with respect to distance below the boiler-sections, byhaving lock nuts, 15', t, on the pipe, t, which look said pipe at anyheight in the slot w, formed in the cross bar w, which connects the legsof the-apparatus.

In place of casting the radiator boiler in sections, as beforedescribed, I might form it in one piece, without departing from myinvention, which is in this respect essentiallya combinedradiator-boiler with the wings as hereinbefore explained. I also find itdesirable to hinge doors, 0:, m on the sides of the base, to conceal theburner and protect it from drafts of air, and I can greatly increase theheating efficiency of the apparatus by placing over the radiator thehood, g which is in effect an inverted trough depending well down thesides of loops but open at the ends.

The whole operates as follows: The boiler being filled with waterthrough the tiller, f, and gas being turned on the burner and ignited,air entering to mix with the gas through the inlet, r, the flamessurround the cap, a, and impinge on the middle part of the corrugatedboiler bottom, and, being confined laterally by the wings, g, g, arecompelled to spread longitudinally under the bottom of the boilerstoward the ends of the whole structure. At the same time some of thehighly heated air escapes through the holes, 71, 77., and heats theloops of the radiator. Steam is therefore formed in the boiler sectionsand superheated in the loops, While condensation taking place at thesurface of the loops, the condensed water trickles down the loops intothe boilers, thus maintaining the circulation.

The radiator-boiler shown in Figs. 6, 7, and 8 is the same ashereinbefore described, with the addition of the pipe or pipes, e, 2,which are extended lengthwise under the radiator base, with elbows andnipples that are tapped up into the base as seen in Fig. 6. The pipe (orthe pipes) is preferably bent to and fro laterally as seen in Figs. 7and8. The burner is composed of a long chamber, 1, cast with burner holes,2, 2, in the top, and forming a mixingchamber. Perpendicularlyconnectedtherewith is the bell-mouth air inlet, 3, into which entersthe nozzle,4, as shown, and connected with the gas pipe, 5. I prefer to turn thebell-mouth air inlet, down and suspend below in any manner thewater-pan, 6, the said water-pan, 6, not being filled quite up to thebell mouth. The burner may be supported in a cross bar between theradiator legs in the same manner as heinbefore described.

Now, having described my improvement, I claim as my invention 1. A hydrocarbon heater consisting of a boiler and a radiator in one structure andof Wings projecting from the boiler and forming an inverted trough withopen ends, substantially as and for the purpose described.

2. The combination in a hydro-carbon heater of a radiatorand boiler inone structure with out independent circulating system, wings on saidboiler forming an inverted trough open at the ends, corrugations on thebottom of the boiler parallel with said Wings, and aburner betweensaidwings,substantiallyasdescribed.

3. A hydrocarbon-heater consisting of a radiator and boiler in onestructure, and of wings projecting from said boiler and forming aninverted trough, openings in said wings for the escape of products ofcombustion, and a burner between said wings, substantially as described.

4. The co mhination in ii ydro-carbon heaters, of a radiator and boilerin one structure, wings projecting from said boiler and forming aninverted trough open at the ends, and pipes between said wingslengthwise of said boiler and connected with said boiler, substantiallyas and for the purpose described.

5. In hydro carbon heaters, the combination with the radiator of ahoodlet down over the top of the radiator and inclosing said radiator onboth the long sides thereof, and said hood being open at the ends,substantially as and for the purpose described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 11th day of June, 1892.

JOHN GRAVES. lVitnesses:

ALVAN F. SERVIN, LOUIS M. FULTON.

